Unless the developers create a totally separate PvP mode for this specifically, which would probably have some shitty queue time, away from the current/new 70 cap PvP that requires gear to be good. This would lead to a lot of under level players becoming achievement points for the level capped players. Think of this scenario, a player with a level 70 character want to level up a level 5 class, should this character be given instant max stat while being naked. I don't think so.
Now, I'm sure someone gonna say "Well, they can create a system like PotD gear leveling.". Nope, we know that PotD gear rating isn't customizable (damn that spelling), for all we know it more likely effects primary stats. We all know that in PvP, secondary stats are king, because we can already cap our primary by using over the level cap gear gear. So sure let's add a system like this and it should come with a little icon indicating those that are in this mode..so I can go to them and BONNK! them in a few hits.